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Reliability optimal tree-shaped core topological solving method of P2P live broadcast covering network

A reliable and optimal tree technology, which is applied in the field of network communication, can solve the problems of high topology maintenance cost and no clear topology structure, etc., and achieve the effects of improving reliability and delay, increasing reliability, and reducing costs

Inactive Publication Date: 2012-08-01
ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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Problems solved by technology

(2) Each node in the network takes itself as the center and actively pulls data driven by data demand, thus forming a network structure without a clear topology
[0008] To sum up, in order to take advantage of the advantages of high efficiency and low latency of the tree topology, and to avoid the defect of high topology maintenance cost caused by frequent nodes joining and exiting, an optimized topology is needed to make it That is, it has good robustness and reliability, and can improve the stability of the coverage network and reduce the delay of live broadcast

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  • Reliability optimal tree-shaped core topological solving method of P2P live broadcast covering network
  • Reliability optimal tree-shaped core topological solving method of P2P live broadcast covering network
  • Reliability optimal tree-shaped core topological solving method of P2P live broadcast covering network

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] figure 1 It shows the topological structure diagram of the P2P live broadcast overlay network used in the present invention. Wherein, 101 represents a backbone node, 102 represents an ordinary node, 103 represents an edge of a tree core topology, and 104 represents an edge of a mesh topology. The topology distributed by the P2P live overlay network usually adopts a mixed tree topology and mesh topology. Because the tree topology has the advantages of high efficiency and low latency, but also has the disadvantage of excessive topology maintenance costs caused by node dynamics. The tree topology is suitable for stable nodes in the live overlay network, while the mesh topology is suitable for more highly dynamic edge nodes. In order to overcome the deficiency of tree topology maintenance and improve the applicability of its adv...

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Abstract

The invention aims at providing a reliability optimal tree-shaped core topological solving method of a P2P live broadcast covering network, which comprises the steps of: converting out-degree and reliability of a backbone node of the P2P live broadcast covering network into weighting reliability through hierarchical out-degree weighting, constructing a tree-shaped core topology by layers by using the weighting reliability as a sequencing basis; optimizing a hierarchical weight set by using an evolutionary programming algorithm, and solving by using the sum of accumulated reliability of all nodes in an evolution process as an evolution index to obtain a tree topology with optimal reliability. According to the reliability optimal tree-shaped core topological solving method of the P2P live broadcast covering network, provided by the invention, the stability of the P2P live broadcast covering network is improved, and the live broadcast time delay is reduced.

Description

technical field [0001] The present invention relates to network communication, and more specifically, relates to a reliability-optimized tree-like core topology solution method of a P2P live broadcast overlay network using a tree-like or tree-like / mesh-like hybrid topology. Background technique [0002] According to the survey, 70% of the traffic on the Internet is currently P2P applications. In the P2P architecture, shared resources can be exchanged directly without the transfer and participation of centralized servers. Good fault tolerance, and maintain good reliability. [0003] Currently, the P2P live broadcast overlay network is the main distribution method of large-scale Internet TV. The topology structure of the P2P live broadcast overlay network can be roughly divided into four modes: (1) The tree structure that simply imitates the IP multicast tree, and multiple Complementary distribution of trees. (2) Each node in the network takes itself as the center and active...

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Application Information

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IPC IPC(8): H04L12/44
Inventor 翁建广邹雪兰贾晓雯黄暑娟
Owner ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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